The next 5 years?
Probably two or three more WoW expansions (I know they
want to do them yearly, but it's Blizzard, so...). Only the hardest of the hardcore fans will care anymore, but there's still enough of them to make it worth mentioning. More of the same is hardly a bad thing for WoW and that's what the remaining players seem to want. It will probably go F2P as well, but a subscription option will remain for cash shop perks and the like.
Guild Wars 2 will keep on trucking, with the Living Story improving in quality and continuing to outpace the rest of the industry in terms of content releases. I'm sure eventually we'll see an expansion or two, but lots of new, unexpected features will continue to be delivered for free. It will release in additional Asian markets (already some hints of that already) and do very very well. Nobody is going to re-capture WoW's sales and population numbers, but GW2 will continue to be the high water mark for content support, speed and quality of life (go read any preview for an unreleased MMO and count how often they're compared to GW2).
LotRO will (finally) reach Mordor, and it should be pretty cool. The game has a really loyal following and they deserve to see the game reach its structural conclusion. It won't die, as there's enough ancillary material in the Tolkien archives to make expansions into eternity, but this is a watershed moment worth mentioning.
Wildstar will go completely F2P within the first year, as the target audience (Vanilla/TBC raiders) are now 10 years older and can't indulge in that play style anymore (despite how much they claim they want it back). Lukewarm reception from most other MMO fans due to archaic questing structure, odd progression scheme and lack of customization. Fades into the background of MMOs that are still around but not very active quicker than anyone expects.
Speaking of MMOs that sort of linger but don't exactly die, Rift will keep doing well enough to stay afloat and continue to release expansions. Trion has really good support and they're a great company, and I hope their ambitious side projects like Defiance don't cause them to implode.
EVE will keep being EVE, and that's both awesome and scary at the same time.
Everything SOE makes but ultimately bombs will live on in zombie form via their crazy multipass system.
TESO, DOA. MMO fans don't want TES-style gameplay, TES fans don't want an MMO. I don't need to say more than that. F2P in under 6 months, plug pulled within the first 2 years.
Landmark does very well as a building game and EQN does very well as an MMO, but SOE lacks the discipline to get them to meet in the sweet spot that their approach requires. By all accounts it is a huge success, but like just about every other MMO since WoW it will be hyped to hell and back and expectations will not be met. It'll still be really cool though.
More old MMO servers will follow in the path of Warhammer Online and shut down as their populations move on to other games. Age of Conan, TERA and Neverwinter would be my top picks. EA may cut their losses and pull the plug on SWTOR, but I doubt it. All comes down to cold, hard math, the players don't even factor into the equation.
I can't comment on the MMOFPS side, though I imagine Destiny will do very well and we'll see more attempts to cash in on that genre (wouldn't surprise me if Borderlands 3 is more MMO-like)
With a few random ones still trying to ask for a subscription.
I'm shocked this is still happening
now.
Everything will suck except Warcraft or Titan if it's out by then.
Titan was shit-canned and it's development staff cut down to ~30 people in a broom closet. Given the way Blizzard works, I wouldn't count on Titan being more than concept art and bullet points within the OP's 5 year window.